Quote:
Originally Posted by djgizmo  in which direction should I fire the speaker? placed on a stand like I normally would, or firing straight down? |
This depends on what you want to test. To test reflectivity you'd elevate the speaker about 2 to 4 feet, pointing down, and put an omni microphone maybe halfway between the speaker and floor. This should be done near the middle of the room to reduce reflections from the side walls and ceiling. The farther away all other surfaces are, the less they'll influence what you measure.
To test reverb time you'd put the microphone and speaker at more or less opposite ends of the room. Everest suggests pointing the loudspeaker into a corner, and putting the measuring microphone about 2/3 of the way across the room on a mic stand.
Again, it is
absolutely critical that whatever placements you use must be identical for all tests. If anything differs by even one inch, what is measured may change just from the placement difference.
--Ethan